Assiojnoe to



(No Model.)

P. BRADFORD.

TRANSOM LIFTER.

Patented Aug. 16, 1887.

UNITED STATES PATENT OFFICE.

PURMORT BRADFORD, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO SARGENT & COMPANY, OF SAME PLACE.

TRANSOM-=LIFTER.

SPECIFICATION forming part of Letters Patent No. 368,452, dated August 16 1887. Application filed May 23,1887. Serial No. 230,073. (No model.)

To all whom it may concern:

Be it known that I, PURMoR'r BRADFORD, of New Haven, in the county of New Haven and State of Connecticut, have invented a new Improvement in Transom-Lifters; and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to bea full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure 1,a side view of so much of the lifter as necessary to illustrate the invention; Fig. 2, an outer end view of the arm with the pitman in connection therewith; Fig. 3, a top view of the arm, showing central section through the pitman-head.

This invention relates to an improvement in that class of transom-lifters which consist of a rod adapted to slide vertically on thejamb, combined with an arm extending from the transom at substantially right angles to said rod, and with a pitman hung by one end to said vertical rod and by the other end to the outer end of said arm, so that up-and-down movement of the rod may impart a swing ing movement to the arm and the transom thereto attached, being a common and wellknown construction of transom-lifters. The rod in this class of transom-lifters is neces sarily arranged in supports upon the jamb, and the arm is secured to one side of the transom.

In some cases the rod and arm will be arranged at the right-hand side of the transom, and in other cases it is required to be upon the opposite or left-hand side. The arm is of substantially L. shape, so as to be attached by one endto the transom, and the other end extends to one side of the transom into the plane of the vertically-sliding rod. Therefore for one hand the arm will be one side up, and for the other hand it will be the other side up. It is therefore necessary to make the lifters right and left hand, or to make the joint between the arm and the pitman, so that the arm may be detached and inverted.

The object of my invention is a simple construction of joint by which the device may be readily convertible from right hand to left hand, or Vice versa.

A represents the usual lifting-rod; B, the arm, adapted to be secured by one end to a transom, and the other end turned parallel with the transom to form a trunnion, C. (See Fig. 8.) The trunnion C, I construct with an annular groove, a.

D is the pitman, hung by one end to the rod A, as at Z), in the usual manner.

E is a pitman-head having an internal di ameter corresponding to the trunnion C, and so as to set onto the trunnion, as represented in the drawings. Upon one side of this head is an internally screw-threaded socket, F, and that end of the pitman is correspondingly screw-threaded, as seen in Fig. 3. The termination of the pitman 1) corresponds to the annular groove a in the trunnion C, as indicated at d, Fig. 3, and so that, the pitman screwed into the socket with the trunnion in its place, the end of the pitman will enter the annular groove to in the trunnion and serve as a stop to prevent the separation of the head and arm. The screw-thread between the head and pitman permits the head to turn on the pitman, so that the arm may be turned from right to left, as indicated in broken lines, Fig. 3, without detaching the arm from the pitman, there being sufficient play between the end of the pitman and the groove in the trunnion to permit such inversion of the arm.

The pitman serves as a set-screw to complete the joint between the head and trunnion, and so that by unscrewing the head from the pitman, or vice versa, the arm may be entirely withdrawn from the head. This is desirable in packing for transportation; but when required for use the head is set onto the trunnion of the arm and screwed onto the pitman to bring the end of the pitman into the annular groove in the trunnion as a stud to prevent their separation.

This construction is cheap and simple. lVhen set in place, it is impossible for the head or pitman to rotate, so that accidental separation of the parts is impossible,.and the apparatus is adapted for either a right or left hand position.

The head rotates freely on the pitman in the opening and closing movement of the transom.

I c1aim naHy-screw-threaded socket, F, the other end The herein-described improvement in tranof the pitman constructed with a correspondsom-lifters, consisting of the L-shaped arm B, ing thread, and so as to be screwed into said one end adapted to be secured to the transom head, the pitman terminating in a stud work 5 and the other end terminating in a trunnion ing in said groove in the trunnion, substan- 15 parallel with the plane of the transom,the truntially as described.

nion having an annular groove in its surface, PURMORT BRADFORD. combined with the lifting-rod A, pitman D, WVitnesses: v hung by one end to said rod, the head E on WM. S. COOKE,

10 said trunnion, and constructed with an inter- OTTO SOHLIEPER. 

